If stable coin will get more investors and those companies will just have that then what is the main purpose of cryptocurrency?
The major purpose of cryptocurrency actually is decentralization and a store of value for your money, that's what I understand as that concept is coming from bitcoin which is the most popular, stable coins are just created later, or use for trading to hedge from volatility.
Now, there's a lot of stable coin with different purpose, and the most anticipated was Libra was is being criticize but once it will be launch it will gain a lot of users that would help to increase adoption in crypto space.
crypto is designed for freedom of currency and the anonymous gaining and saving of your wealth!
Crypto is here and the stable coin will not add anything but the demand is the best way to get more demands from people!
That was the original purpose but this market is growing and its normal to see more coins created, and stable coin and volatile coins are both useful as in real world, most of the things and services are still bought through fiat.