Can you afford to wait a minimum of 12months to make any profit? That's the question you need to ask.
Yes.
And a 100% return on investment in 1 year is gold
Is there a real possibility it can go there?
Just to be clear, given your definition of "100% return on investment", if you stuffed your money in a mattress and it didn't burn up or get stolen, you'd have "100% return on your investment" (i.e. you just broke even).
Anybody with $100K to invest should understand that getting you money back is 0% ROI, the only profit you would have would be the residual value of the miners. If you think they are still valued at 100% of their original cost,
THEN you would have 100% ROI.