Did any one of you lose money buying Bitcoin?
Panic sellers did.
If yes, Did you again reinvest in Bitcoin after losing?
I've lost before as I'm also a panic seller. Those were days that I don't have keen plan on how long I'd like to stay holding bitcoin and I'm still on doubts. Long story short, I have bought from my savings and happy to see it grow now.
If yes, What need you reinvest your money on Bitcoin?
Please rearrange your words, what you mean by 'need'?