I don't like the phrase, "Crypto is dangerous." It is better like this, "Crypto is risky. Invest and trade with caution."
I like your advice that we should always have a backup plan. That is true. Do not focus on one task or plan. Because it is not always that everything will fall according to your plans. So always have plan B, C, D, and so on. So that when plan A didn't work out, there is plan B up to plan Z.