At this stage, sell their altcoins in order to buy bitcoin is no longer worth it. Now bitcoin has become less popular and for a number of reasons it may no longer yield the same incomes. Bitcoin should continue to be a priority for investment, but not the only priority. Along with bitcoin, you need to keep ethereum and other coins. Very good prospects have certain tokens and if very well to understand the intricacies of the crypto currency market, then new little-known tokens will bring profits much more than bitcoin. Therefore, you should always keep promising tokens, and for bitcoin leave about half of the funds in this coin.