If you are starting to doubt ETH and SOL, how can you possibly have faith in altcoins? If you are even doubting Bitcoin, you should quickly leave this industry or step away from so-called risk assets. Inflation is something that will never change in the dollar system for a lifetime, until the end of the dollar era. The only things that can resist inflation are Bitcoin, stocks, gold, and various assets (each with their own cycles). Until there is a next anchor asset, holding cash is a short-term choice, while holding Bitcoin is a long-term choice.