Don't buy btc now. It's already high though it can still go way higher but too risky to buy into it now.
My first advice is to join a paid crypto signal. They really help in directing and organising pump action for alt coins that you can easily make money off.
Learn crypto trading.
Some of the coin I suggest you buy is HOT, ETC, Tron, ETH, LTC, NEO and a few others.
If you know what you are doing and your investment is good you can easily make $500 to $10,000 or much more monthly. Those alt I mentioned are already at their dip so you can't lose much.