Might be a decent business to start
leasing out mining equipment to the miners as a lot of loan requests seem to be from miners looking to buy the mining equipment outright.

What about rent-a-center for Mining equipment? We can get the uneducated in on Bitcoin!
lol rent a centre.
If you reference it to say the Australian stock market (lots of mining companies in it) the mining services companies (who provide the mining equipment) have made 10 x that of the mining companies themselves in revenue less costs on a % of return scale.
The issue it seems is that a) the mining equipment only has a short mining life and b) hard to get hands on the right equipment quickly.
Overcome those two and it could be a goer.