In my opinion for now it's better to invest a lot because the price of Bitcoin is decreasing, if you are going to sell it no it will suffer losses because the price is down. If you invest now maybe you will experience profits because the price decreases and you can sell it when the price go up.
well, selling might be a bad choice. however we see that the price of bitcoin is decreasing quite a lot, and that could be an opportunity to invest, or buy it in large quantities. even this applies to other coins. I have a few coins that I hold, but I won't sell them at this time.
We should not panic with current market condition. Its an opportunity for buying more coin, many good coin drop the price more than 80%. Selling our coin and cut loss in this bear market is no wise unless the project is not running anymore or developers team not too active.