Yes, buying BTC now is gambling. It could fall down to 5500$ support or continue grow to 9000$ noone knows for sure. The golden rule tell us not to buy on peaks.

If you want to invest now look at some good altcoins. My recomendations

ETH
Monero

or any other from top-10


If you can handle more risk look at other alts in TOP30. My recomendation

OmiseGo
QTUM