Put your funds in many baskets. In case the one gets hacked then some are safe. Same with trading. Dont go putting all your funds in a trading website, just deposit the number that you are willing to risk.
I guess that is the first rule when you are trading.
Next is control your greed. Be satisfied with a little profit then wait for the dip again.
You could also put an order just in case it dips you dont need to wake up with its alarm.
The OP should also analyze the coin he wants to invest in. To split the funds he must actually earn that same funds with the proper investment into the more prosperous coin that has high possibility to return to the initial value after correction phases.
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I agree with the exchange rule of putting the small amount of money split between different exchanges because there are many new hack attempts which have influenced new investors because the some of them held a big amount of funds in one exchange. The proper coin investment means nothing to the investor if the wallet is open to the easy hack.