My top tip is this: both bitcoin and alts have flash crashes from time to time, and the way to take advantage is to set very low buy orders well in advance.
Sometimes you have to wait months for the orders to execute, but then it's extremely profitable because the price rebounds back and you sell at a decent profit.
That's true and many sometimes panic whenever a crash occurs. It's normal for the price to go down every once in a while and we should not panic when this happens. If we sell when the price drops, we will lose and will contribute to the price drop. We must continue to hold and wait for the price to go up if we want to sell. The price will rise after it goes down.