Investing in clouding mining is now a total waste of time.
The miner is the beneficiary here , who will charge for maintenance of rented rigs at your expense profit or no profit!
I'm thinking of start selling bitcoins on localbitcoins for paypal and stuff, but I need to know which best way to double bitcoins is it cloud mining? investing or trading?
Unless you want to gift some scammers out there with your bitcoins stay away from paypal