It seems like those people you are talking about who afraid of investing in BTC think that bitcoin already reached its fullest potential, well in fact it is not and no one can say about that, as long as there is an Internet connection, bitcoin will still be there and people will still keep on buying bitcoin. Those who are afraid will lose the opportunity to gain more money with bitcoin.
That's right, the potential for bitcoin is still very large to see the enthusiasm of the bitcoiners... fear or not, the price depends on each person, many are afraid to buy bitcoin but many still buy and continue to buy even though the price is high ...