Having this kind of volatility and a recent price dip makes it a good buy in the long term. If you believe that Bitcoin is going to go higher in the long term, this is a great opportunity to buy in. With all the interest being seen with the recent happenings with ETFs and institutional investors, it would be a great idea to have more. The coming halving would also give us more hope with the chance of having more.
I believe also that DCAing on to BTC is the best way to have a profit. Believe in it and you know that you gave it your all.