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 will have some profit to hold on to
In your interest I think you should know that the market has always been unpredictable hence, it is always advisable to take advantage of every opportunity that presents itself provided that there is money readily available for investment that is to say that one should buy every time irrespective of the market conditions, long term should be the best goal and at such it is wrong to talk about profit when you are meant to be filling you tank and get get as much or little as you can within your level of discretional income consistently.