As at the time you posted this as all time low, it was around 9k$ ,but funny enough it fell to as low as $3800 but then bitcoin is one asset that when ever you decide to buy,you can always make profit, just don't rush it,look for a good entry and you are good to go. It's alway a good plan to hold some BTC and to know when to take profit.
Exactly! From February 26th to now, Bitcoin had a high dump and pump both! 3800$ was like an accident or an opportunity for the buyers, and that was for a very limited time! You are right that holding bitcoin is always a good idea but i won't say buying bitcoin is a good idea all the time! If bitcoin at a high price then there will be dump surely, so wait for the dump and buy at a low price!