You are saying correctly, you should not leave the industry crypto-currency due to several failures. Everyone should understand that investing is a risky business, and investing in a crypto currency is a risky business in a double. However, by investing in crypto currency you can increase your capital at least twice.
Why just twice? With right investments you can become rich. That's why it's so interesting.
If you are trader you will also think kind of that to invest on various coins and make profit with that bro. If you invest on the right coin you may find the profit according to the demand and supply you will get the price spikes up mate. I see the bitcoin and ethereum are very much reputed coins as it is being top in the market.
When the marketplace value is low you invest more money on these coins as much you can. It will be grow bigger as time goes big mate.