Anyone purchasing bitcoin should be already at some standing ground has told themself to be okay with a loss at some degree.
If not, then I wouldnt suggest it.
The main focus should be though is, increasing your personal fiat cash flow to have a better purchasing power so you wont have to focus much on the bitcoin rise or fall imo.
when we have good buying/purchasing power ?
i have experience bought bitcoin worth $100 and the price down my bitcoin value dropped to $96 i lost $4 in one period and i bought bitcoin again worth $150 now in lower price and covered the $4 loss when i sell my $246 worth bitcoin at higher price , as a result i made a good profit and yeaaa it workk for me.
If you think the bitcoin price will rise in the long term, there is no need to panic sell. Just hold for it.