The golden rule is and has always been, "only invest what you can afford to lose." That way, whatever happens you don't need to get stressed. Life is short and we really shouldn't worry about little things like shitcoins. Better to be safe and just invest in blue chips like bitcoin or ethereum.
Yes that's right. If you don't want to lose then use your brain and be wise to make your own strategy. And if you lose then make your plan B. Just learn from your mistakes.