I do think that it's a good idea to accumulate during the bear market phase.
The only way that you lock in your losses is if you realize them by selling at a lower price. If you keep your position open through the thick and thin then you are much more likely to come out on top at the end.
There are a lot of new money that flooded into the crypto ecosystem during this bull market, which really shows as people are panicking over this 20% drop over the past week. Nothing to be concerned about.