Strategy: Grind through active gameplay until you have a good amount of upgrades and inventory bought. Let it afk overnight to accumulate tier 1 currency on reset. Prestige. Repeat until you're satisfied.

This makes the game very idle, and easy to play on your off time.

Edit: I also recommend setting your tickspeed in settings to like 10.00001 ms, because it makes it way more satisfying seeing things work fast, no clue how much of an effect it has on profit though.

Edit edit: new suffixes stopped getting added after Sg which is 1e+183 in scientific. I currently have $5983643596.94 Sg in currency, and the upgrades don't display higher suffixes too. Also the game starts to actually get a bit laggy around this point, I have to refresh the page for it to unfreeze after long afks.