Been here since 2013 and I already saw this happening at least twice (2014, 2018). The price skyrockets, predictions are crazy, companies get in, adoption seems to get boosted, and many other things we are experiencing now. Then, one day the price goes down. From 1200 to 200 (2014), from 20000 to 3900 (2018). I know we all want this time to be different, but I truly think it's going to be the same.
Be Smart. Define points to sell and transform the numbers on your wallet on FIAT. Chances are you will see it crash and go much lower than your exits. If you are a holder, then this will allow you to buy cheaper.
Those are my two cents ...
Basing off with those previous years and experience that we had in the past then it cant really be avoided not to think that it might really happen again.
When it comes to possibilities then it can happen again but for those who do really go for long term then this wont really be an issue.
Exit points is a must for those who do go for short term trades to ensure out profitability.
Re-entering the market is much more difficult because we wont able to now on when and what price it can possibly fall.