So do many third world currencies. So does the Stock Market. Hell Canada's dropped 30 % to USD didn't it?In all these scenarios, the currency is stable, and going to be there when you need it.
The truth is... it is incredibly volatile. Its value has made wild fluctuations, and may take a wild down turn.
As to crypto I watch my portfolio dip 35% a few months ago. It is now sitting at +70% from my last buyin. Its going to get one more rise then dip sept 12th. Im planning another buy into one then.
Volatility is relative. Pull out and look at the yrmearly, 4 yearly and the patterns emerge. Watch for announcements and dates just like a stock and buy/sell behavior can be predicted.