Gambling has never been a good accumulation strategy, but you mentioned that you used to do GPU mining when it was more feasible. I would probably suggest investing whatever bitcoin you have into GPU rigs and head over to a site that automatically picks the best coins and algorithms to mine with and automatically converts this into Bitcoin for you. This would enable you to use your already mined and stashed bitcoins to continue mining and stashing bitcoins for you. Everything else has too high of a risk factor, day-trading may go wrong with a few bad trades, gambling is too risky and opening your own business has it's own problems.
So after all the years of trading experience, my best suggestion for something more reliable would be get back into mining. GPU mining is still feasible, just not for bitcoin, but you can get it automatically exchanged into bitcoin so it is the same outcome.
Hello, thanks for your response. Have you a reliable website doing what you suggest ? Thank you again.
(P.S. Other exchanges like Bitfinex also offer lending, but I'd steer clear of them as they seem to be under Federal investigation over the tether business).
Thanks for your response. I have checked the rates on poloniex and the majority is indeed ultra low. It seems that some demands are sometimes not that bad so I will try it out.
Hope it is not too scamy.