Hi.
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?
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thanks

With no doubt,trading has been found as the best and legit way to earn bitcoins.
Most of cloud mining farms have turned as scam nowadays except some legit farms like Genesis.
Investing would not give huge returns like trading and also we could not take back our money until the maturity period once invested.