Fidelity on bitcoin:
“If you have a time horizon of, say, 4 to 5 years, you may want to be cautious here,” says Kuiper. “If you buy now, you might end up getting in at the top and experiencing a 60%, 70% drop in price or more, based on how bitcoin’s price has acted in previous bear markets.”
https://www.fidelity.com/learning-center/trading-investing/crypto-outlook