Tether f.e. (handled in BTC) fluctuates exactly the same as bitcoin in USD.
Wait what? I'm definitely not saying that holding Tether(USDT) is the right move, but being completely centralized, it has been mostly $1 with only small rises and drops in cents.
Seriously though, screw "crypto", just hold fiat if you need to
temporarily hold something with low fluctuations. For long term though? gold and/or bitcoin.
Aaaye thanks for the plug! <3