I hope very much that by the end of the year the price of Bitcoin will rise significantly. To do this, there are many reasons. Therefore, currently selling naoplennye Bitcoin is not reasonable
It is ok to sell if you have made a lot of profits already. I myself sold most of what I have when the price was still at $650. The future is uncertain and there's no assurance that the price will continue to rise. I was able to make some profits from those that I bought when the price was still below $500.