Nothing is too big to fail in crypto world, Terra Luna is a big example that the safety of your money isn't guaranteed even if you invest in top altcoins out there, it's the same risk involve with crypto generally including BTC but BTC is just way safer, I have seen people losing 6 figures to Luna and some Defi projects, first of all try to understand what you are going into, many don't know how risky crypto space is, take risks with what you are ready to throw away.
Yes, nothing is too big to experience a downtrend in the crypto market because the market is all volatile in nature but the issue about Terra Luna is something every cryptocurrency investor should know it's going to happen. Why do I say that?
I believe the crypto investor is making the same mistake because you just invested in the Terra Luna coin without reading the concept of the project.
I don't know maybe most people invested in the project because it claimed to be backed with BTC but the project concept was "price stability and wide adoption of fiat currencies with the censorship-resistance of Bitcoin (BTC) and offers fast and affordable settlements. " and it was said to "use of fiat-pegged stablecoins".
Which they are just creating another version of the mistake made by the Central Bank. I don't know if they have learned from their previous mistake but people to stop investing in hype base projects especially those that the influencer claimed to have invested real big money without doing their own research.