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.