Many altcoins even more volatile that bitcoin, because they do not have the liquidity like bitcoin. It is necessary to hold altcoins somewhere, that is why appear wallets like https://twitter.com/ownrwallet/status/1503739848569589764 which allow to safety store cryptocurrency.
Now investors have a very big choice of different wallets to keep their money. But the most important condition for wallet is its safety. Also wallet must be safe and comfortable for use.