Eventually you will have 100 million dollars in your bank account and have 100 million dollars worth of crypto currency as well. With those currencies you could basically sell all of them at once and withdraw it to cash. Now, you have 100 million dollars in your bank account and another 100 million in another account. You basically made 100 million dollars for free. Its a no brainer for people who can actually do it.
What he meant was that the stable coin (USDC, GUSD, TUSD or PAX) is backed by the same dollar value in a bank, not in the name of depositor but on the token itself. Whoever owns a stable coin is safe from anything (whether manipulation or crypto downfall) because the token represents a dollar deposited in a bank.
174m is nothing in terms of the crypto market and you cannot even be sure that this money entered the market
It's a big thing actually. It's buying a stable coin out of these exchanges who are offering it available, and I think it's a safer way of entering the market because it wont print unusual green candles. Btw, these stable coins are also cryptocurrencies but only is backed by dollars to maintain it's stability and safety.