Even if at all they are able to ban stable coin which am still wondering how they are going to succeed in that aspect, people will result in using fiat most, stable coin are some how playing the role of fiat in a digital way, and since almost all crypto users prefer to use stable coin I guess the government are not happy about it, still looking for a way to inflict pain on crypto since they can't outright ban it, and knowing the importance of it to crypto community it becomes their point of target.
That's certainly true, mate. If governments ban stablecoins from widespread use, people could simply resort to Fiat directly via a bank account. Stablecoins are only there to provide users the "best of both worlds". Sometimes you'd like to have the stability of Fiat with the security/reliability of Blockchain. With a stablecoin, it's possible to achieve this. While the market is saturated of both centralized and decentralized stablecoins, there's a wide variety of options to choose from.
For the sake of the stablecoin industry's growth, it's best that governments regulate centralized stablecoins more thoroughly. Instead of banning them, governments could work together with crypto companies and startups in order to make the world a better place. One of the good things centralized stablecoins have over decentralized ones is that they're backed by real-world assets. Most (if not all) centralized stablecoins are backed by Fiat reserves on a real bank. That's not the case with decentralized stablecoins, since they're backed by algorithms more than anything else. Stablecoins of this type (like DAI and bitUSD) have a higher risk of losing their stability in the long term. Consider NuBits (USNBT) which was once a decentralized stablecoin with a price of $1 USD. It's now dead lost, worth cents on the market.
Nonetheless, the fate of stablecoins will depend on how companies and startups cooperate with governments worldwide. As long as there is a regulatory-friendly environment for centralized stablecoins, there should be nothing to worry about. Ultimately, people like you and me will end up using decentralized alternatives if governments decide to ban centralized stablecoins in their entirety. A stablecoin ban will make little to no difference, if there's a way to trade crypto against Fiat in the mainstream world. Just my opinion