I depends on how much have you invested and when 
One can't share it's opinion if he/she doesn't know the details.
Anyways, I think investing in btc a little amount can not to be a mistake.
Little or much, i think as long people use money that really free, not used from daily need, or maybe not from loan or sell assets that really important, will be ok. What can be mistake from people if they make investment because of fomo, or maybe only because see other people get profit from bitcoin investment. With that, they will directly expect from profit and then make investment without deep analysis. One can't share it's opinion if he/she doesn't know the details. Anyways, I think investing in btc a little amount can not to be a mistake.