You have a $20 bill, and you need to double it. You have 1 month, you must keep it in cash (No banks, cashapp, credit cards), you don’t have an address, a phone number, or and you can’t interact to people in public. using just the internet and an email, how do you double the money?
In the money value system? Buy and resell drugs, or prostitution.
With prostitution, you don’t even need the initial 20, but that’s basically a kind of work so I don’t think it’s in the spirit.
Probably ditto for finding someone dumb enough to buy your overpriced single gram. If you can actually build a client base and find regular suppliers that changes, although then you have to deal with the risks of being a drug dealer.
I would hope sex work involves soap, condoms, some sort of deodorant, clean clothing, a clean room, etc. I don’t think the single gram is an issue when the main dealer cuts you off because the bill is too high and will keep your 20 and give you nothing.
In fact, trade a sex act for a few grams, purify, resell. But I’m not doing any of that and understand people need food and shelter so I’m not mad if they do.