5️⃣The use of an exchange instrument that was invented to take money 100% (it's only a matter of time when this will happen and with which "market is to blame") - futures. Violation of elementary concepts of risk management, and in some characters (mapping who is in reality) generally adequate logic of a mentally healthy person.
We all know that the common use of an exchange is to convert the cryptocurrency into fiat. But since we are in the modern world, exchanges are continue to develop where we can see a lot of new features in it. That's why instead of just converting, people were use to stay on the exchanges because they are still using their other features. That's why we have to vigilant and aware of this, because sometimes we are losing money in exchanges. Not only that, the biggest fear is that when you are using Cex and you used to put all your money in to exchange for awhile to convert but unfortunately the exchange was shutdown, you can't recover all your funds at not until they do a refund. However, people have similarities but they are not totally the same.