ETH is going strong. Just a bit more, and it will break the all-year high. If you want to get in, be cautious and prepared for a shakeout.
For example, you can bet $100 that after it hits $4,094, it will not go back to $3,500:

100 / (4,094 - 3,500) = 0.168

Your maximum long position is 0.168 ETH. If ETH drops to $3,500, you lose $100.

Thinking in bets helps protect your capital when you are wrong, while bringing you beautiful profits when you are right.