I would not buy now. At least from the psychological side. Perhaps now the peak of growth, and I will wait for a correction of 4-5 thousand. It must happen sooner or later.
I think that it is smart to invest in it now because the value may still go up and if that happens it is only profit for you but it is also possible that the bitcoin value goes down and if that happens i think that you will make a good amount of btc.