If a coin or token has reached high price values, of course, it is better to sell it at least partially. However, it is necessary to make a decision taking into account the capabilities of a particular project, its ability to grow and expand further. Now, indeed, bitcoin has already reached three times the price of its previous price record and can both rise and fall. Therefore, you need to periodically fix your profits so as not to be an outside observer only of the rise and fall of our cryptocurrency.