If they open their minds about bitcoin's investment, they will not think about it too late to invest in bitcoin because they still have time to start buying bitcoin. If they know that they can buy fractions by a fraction of bitcoin, they will try to use the money they do not use for anything, and they will hold it after they finish buying bitcoin.
Waiting for the dropping of the price will always recommend for people who want to buy bitcoin because that can reduce their risk from fluctuating the bitcoin price. Perhaps, they need to learn more about the bitcoin investment side before buying bitcoin.
What happens is that many people think it is too late because once they find out that you could have bought bitcoin for less than a dollar at the beginning of its life and now you need to pay 55k they are reluctant to do it, they do not understand that such a low price does not matter anymore because we are never going to see it again, what matters is its current price and what price it can reach in the future and under that perspective bitcoin is still trading at a relatively cheap price.