Here is some alpha:

$35 to $45 is a good premium price for 1 month max expiration options on $eth calls that are the first first strikes up for atm.
Ex: Spot price $1600ish , strike $1700 , expirations 2 to ideally 3 weeks out and a cost of $35 to $45
When you expect volatility, expecting upcoming events or a good setup this is a great way to lock in 40 to 100 % everytime. Just never ever hold, always close on the pop.