I would choose both options, crypto currency and physical business. I will integrate crypto currency to the physical business as an alternative payment option online. But, if I would only be able to choose one, I would go for crypto currencies because most of the time, I am in front of a computer and online most of the time. I'll learn trading and different strategies on how I can make profit short term and would be satisfied to a 10-20% daily profit thru crypto investments.