It is better to seek the advice of an investment expert before doing any major investment on Bitcoin or a few altcoin at the moment. In most cases when new ATH is hit the market becomes so unpredictable. Except the goal is on a long term basis then the risk is worth taking but anything otherwise I sincerely won't advise anyone now to rush into buying I can only suggest taking some profit so that if the market retraces they can buy more and if it makes further moves upward then they won't be in complete loss