*BTC mining
In 2021?
Nope.
This isn't 2015. The current level of mining requires more electricity usage than most people can access.
It's still but only for those who can afford to buy those miners and actual equipment for bitcoin mining. They're not cheap so it does really requires your capital to be able to mine bitcoin. It's still a thing and will always be.
What about escrow or IRL brokerage?
There are a lot of escrows already in the forum but if you think that you can be trusted just like them. You need to build your reputation.