Overall volatility is my biggest worry. If I were to put a significant portion of my money into crypto where could I put my rainy day money?

If I put it into any set of cryptos out there I’d be down 20% some days, up 20% on others. This is all well and good but I’d like to see a more stable crypto created. Although with this low of a market cap it likely isn’t possible. It’s still early days and there’s still a lot of marketcap left to gain!