I don't use use my bitcoins. I am thinking to hold it for a year or so to see what happens. But my amount is not any near of yours. I think holding now is the best way to grow money
yes there is o doubt about that long term investment is too much good. as in long term investment we have very little chance to lose money
Long term investment requires patience till the end you choose to drop the investment because maybe it takes more than a year to reach a goal and for those who can't waiting too long, long term investment is a bad idea for them.
For long term investment bitcoin is quite valuable, because last year start the price was $400 and today the increase is around 200%, which could never be attained in any other investments. Personally I don't have big savings as the small earnings help settle small requirements.