The best bitcoin investment
and very fast grow your bitcoin is only trading, but must have skill
I agree with you 100%. The best way to earn fast is venture into trading but before you go into trading you must be sure you have all the required skills that is expected of a trader. With that and a small amount of bitcoin you are good to go. But after becoming trader also, we need to have sharpening our skills, that is the big requirement in trading field.