I got you.

The message you see in the original post is a rather persistent spam message unique to Lemmy as far as I can tell; has it appeared on other Fediverse platforms?

I do not have proof of this but it strongly appears to be a pig butchering scam. This is a long-term confidence trick wherein the scammer never directly asks for/demands/extorts money from the mark, instead they pretend to be a friend or even romantic partner for a long period of time, building trust, until they mention making a lot of money in an investment, which the mark asks how they can invest too, and they are directed to a legit looking app or market, put in a bunch of money which they never see again.

If you haven’t been on Lemmy long, you’ll probably get a DM from “Nicole” sooner or later. We’re kind of fond of her because our little platform has grown big enough to attract at least one scammer.