Stablecoins: reserves, control and infrastructure power

How stablecoins quietly became the real power in crypto and why nobody talks about the risks

Stablecoins are sold as the safe corner of crypto.

A place where you park value, avoid volatility and wait for your next move.
In reality they are not a side product.
They are the core plumbing that keeps trading, DeFi and liquidity alive.

When you follow the flow of stablecoins, you do not just see side activity. You see the real backbone of the entire market.

Today a handful of dollar pegged stablecoins sit at the center of crypto.
The market cap of stablecoins is more than 230 billion USD.

USDT and USDC together make up around 90 percent of that, with Tether alone at roughly 150 billion USD and the clear leader by trading volume and adoption. (Decrypt)

Most altcoin trading pairs on the largest exchanges use stablecoins as the main quote asset. If you remove stablecoins from the order books, most of the apparent depth and liquidity vanishes.

Tether sits right in the middle of that.

Research from the IMF and industry analytics shows that USDT dominates global stablecoin usage and commands a very large share of stablecoin trading volume. (imfconnect org)
At the same time, rating agencies and regulators keep raising questions about its reserves and transparency.
In 2025 S and P Global downgraded the assessment of Tether’s reserve quality to its weakest category and highlighted the growing share of riskier assets and the lack of detailed, audited disclosure. (ft com)
Tether insists it is fully backed, but the structure is still opaque. When the largest source of liquidity in crypto is a black box, that is a structural risk.

USDC looks cleaner on paper.
It is issued by US based companies, subject to US regulation, and publishes regular attestations and audits.
(Hello decentralisation but you know...)

But that safety comes with a different type of risk.
In March 2023 the collapse of Silicon Valley Bank knocked USDC off its 1 USD peg.
At the low it traded around 0.87 USD after Circle confirmed that about 3.3 billion USD of reserves were trapped at the failed bank. (Decrypt)
DeFi positions that used USDC as collateral were liquidated, automated protocols reacted instantly, and the event showed how strongly a crypto stablecoin can depend on the health of a single bank in traditional finance.

Algorithmic stablecoins showed an even darker side.
Terra UST was marketed as an innovative, decentralized alternative that did not need cash reserves.
In May 2022 it collapsed and erased more than 40 billion USD in value, triggering a chain of failures that hit funds, lenders and exchanges across the industry. (Binance)
This was not a small experimental project.

It was a top 10 system by market cap that many believed was safe until it was not.

Stablecoins are no longer just an internal crypto tool. They are bleeding into the real world. Recent work from the IMF, BIS and others shows that stablecoins are heavily used for cross border payments, remittances and as a dollar savings tool in emerging markets where local currencies are weak or inflation is high. (IMF)

In countries like Brazil, regulators now report that stablecoins, especially USDT, account for a large share of crypto transaction volume, mostly for payments rather than trading, and are moving to tax and regulate that flow. (Reuters)
When a private issuer’s token becomes a de facto dollar substitute in fragile economies, the risk is no longer only about traders. It becomes geopolitical and social.

Concentration is another hidden problem.
On chain data shows that a small number of very large addresses hold a big share of the circulating supply of major stablecoins.
Many of these are exchange wallets, market makers and institutional players. (CoinCarp)
Retail users imagine a neutral digital dollar.
In practice they are sitting inside a system where a few big actors can move huge blocks of liquidity in or out of the market in a short time. That changes spreads, slippage and risk for everyone else.

At the same time international institutions are starting to point out how large these players have become.

Recent IMF analysis notes that Tether and USDC together now hold more US Treasury bills than some major sovereign holders, which ties the balance sheets of private stablecoin issuers directly to the global bond market. (IMF)

This is a strange new world.
Crypto that was supposed to be independent of the legacy system is now partially backed by it and can feed stress back into it.

The most dangerous part is the illusion of safety. Stablecoin charts look flat so people assume the risk is zero. But the history is already clear.

We have seen a fully fledged algorithmic collapse with Terra.
We have seen a major fiat backed stablecoin depeg after a bank failure with USDC.
We have regular critical reports about the transparency and reserve quality of the biggest player, Tether.
We have warnings from the IMF, BIS and other bodies that an uncontrolled run on a leading stablecoin could trigger liquidity stress in the wider system. (ft com)

Crypto today depends on stablecoins far more than most users realise.
Trading, lending, yields, derivatives, DeFi incentives, cross chain bridges and even basic exchange operations lean on them.

If one of the dominant stablecoins were to lose trust in a serious way, the result would not be a simple price dip.

It would be a systemic shock that hits liquidity, prices and confidence across almost every part of the market.

Stablecoins are not just the calm parking area of crypto. They are the critical point of failure that holds everything together.

Until the market treats them with the same level of scrutiny that it claims to apply to other parts of the system, the real risk will sit not in the coins people speculate on, but in the tokens they think are safe.

As always in crypto: stay alert and keep yourself informed.

Thanks for reading and always DYOR.

-by $MASTR crypto project