Obviously, some people used to think that the only way to make money in crypto is just the one way direction which is buying, well if that was to be the case no one would had been making money off the market, however I have come to understand that there are one way traders, these set of just are specialized in one price direction up or down, from the op's point of view, seem they're only interested in the appreciation of coins, there's this feature in Binance platform where you trade a coin to get more of the coin in this case you wouldn't be scared about what the market is doing tanking or not you're making money by increasing your holdings, let's say for instance when the market is dipping you can short the market and while it's going your Bitcoin or any other crypto in your portfolio is increasing in its number as well.
If let say it works like that, that the only way to make money here is through buying, of course it is still possible to make money or profit through it. When we say buying, we don't just buy alone but it can be the other name for investing. Sometimes investing is also called as HODLing too. When we invest, it is not only limited to buying but there is also selling there. That so-called ' one-way traders ' are so wild because trading should work in two directions. Even investing works in two directions two but it's just that there are longer times when we HODL our coins than the selling time.
These people should better do investing instead because it is close to what they are aiming for but in trading, both directions should be utilized well, as this is where we can earn massive profits and not only when the coin is pumping up. The one you are talking there about Binance, sounds like an airdrop for a newly released crypto. If not, it is a kind of trading program or trading competition offered by the trading platform themselves. There might be a downside on doing this but it is still up to us. If we think it is more better than the traditional way of trading, then why not?