The thing that a lot of people - apparently you included - do not understand, is that if you are going to buy something, the time to buy is either on its way up, or when its elasticity is high. The worst mistake you may ever make is setting arbitrarily low prices far below the current price, saying that "this is when I'll buy." If/when the commodity (stock, cryptocurrency, whatever) gets that low, by then it would be more likely to go lower, than higher.
This is part of why so many stock traders lose money. Rather, than, say, paying a higher price for a volatile stock earlier in the day when people are still scooping it up on the dips (high elasticity), they enter some very low price, below the low for the day, that - if it hits, may hit only after buyers have lost faith in the stock and it may be more likely to push even lower than necessarily pop higher.
It seems counter-intuitive to pay higher than lower, but WHEN you buy is more important than at what price.
This is really not something that may be taught. It comes with years of experience. Try to teach someone this, and still - he will refuse, will keep trying to put orders to buy at arbitrary levels, where he "thinks" the commodity should drop to in order to be worth buying.