I dont trade and still have a lot of BTC since 2011.
If wanna invest in ICO´s I take new Fiat money for this.
My BTC I will hold untill it will hit 25000Dollar each one than I will cash out quiet a few Million USD
That's a very ambitious goal, well it will happen in the future because the progress is really good for bitcoin.
If the current trend will still happen, maybe in less than five years you can already start to cash out.
Good luck to you man, hold firm.