Its too early to conclude that the prices of altcoins are recovering. Its gonna take a while for the altcoin market to recover. StableCoins are making it impossible for altcoins to increase in market value alongside bitcoin.
Stablecoins are not making the price of Bitcoin any higher. I stay away from them.
Stable coins can only be use to convert your BTC if you think the price will be declining.
Stable coins cannot be use as investment since you will not earn any profit with it you will just securing your profit from other coins when converting in it.