While investing, one thing to try to protect yourself from is downside risk. What happens if your investment looses value?
One thing that I have tried to do is invest in projects that return fiat/cash monthly and buy bitcoin to pay me back. That way, if the market price of bitcoin drops, these investment would buy more bitcoin at the cheaper price to add to my collection.
Another point is that selling bitcoin for fiat/cash is not it’s only use or way to get out of bitcoin. There a companies that accept it for payment. I like to use Purse.io and have people buy Amazon wish-list items for my bitcoin at a discount!