I am just intrested - is any bitcoin holders are intrested in investing in ICO which pays out in bitcoins? or fiat is much more intresting?
Anywhere you want because bitcoin is like a regular paper currency and you can use it anywhere in the country. But my suggestion to you is that you must wait for some time and when the price grows more than you can use your bitcoin for your future dreams.
The most favorable use for me is in the future when we dont have any job and cant do any more work. Then we will need money of our own to spend the rest of life comfortably.