Well, I'm as investor prefer holding because as I know, bitcoin is volatile investment.
It means that if you have more bitcoin, you can move the market so I'm prefer to hold in long term and it's proven profitable !
Will continue hold until few years ahead
If you really want to "move bitcoin" than you need to hold a lot of bitcoins. Maybe atleast some 10% to 20% of the total circulated bitcoins so that than you can manipulate the price of bitcoins by creating huge buy/sell orders. I don't really think thay if you hold bitcoins in decimals than it would affect the price for bitcoins anyhow. But yet holding bitcoins can make you earn money as the demand is predicted much more higher in the future which will draw the price for bitcoins to a greater extend.