Holding of your coin is the biggest wisdom in any crypto currency as being patience is your wisdom and if you are holding your coin and are precise with buying and selling of your coin then nobody can  stop you from being bitcoin billionaire as you are the wisest if you know that bitcoin valuations are subject to flactuation and varies according to market demand and supply and then you are playing your move according to that only and there is nothing to worry that in that crypto currency, I am investing will collapse as these crypto currencies are very sustainable one.