If you think it is too high only buy a small amount with a plan to buy more if it goes lower. This way you will at least have some if it goes higher.
maybe start buying in a gradual way, because with a small budget by pushing yourself to big soon can have very bad consequences for our finances, buying and selling crypto currency is not binding so it gives freedom for beginners to trade anytime and with our budget able to trade, only input in step, that is, this is only a business, so profit and loss have no guarantee whatsoever.
There is no need to buy a whole Bitcoin while you can buy in fractions, depending on how much you can afford to invest at the moment. Some keep thinking its a must they will buy a whole Bitcoin at the current price but thats wrong, you should just buy in USD, how much you can afford and you will have it in your wallet. When price is rising you will also make profit like others that bought one full Bitcoin.