1, with you on that. 2, hearing differing opinions about this from the community. 3, might be, although I think that we have somewhat "made it" with the ETF-approvals- at least as an investment-asset.

Fabs

I'm stilling trying to think them through and have been for some time but here are a few.

I can't think of all of my concerns right now but those are a few. That said, I do not think they are likely to kill bitcoin.

bitcoin

They Aren't Sending Their Best to Fight Bitcoin. Right?

kepford

I'm stilling trying to think them through and have been for some time but here are a few.

1. Its not ready for world wide adoption as money. We will have to have L2s for it to truly be used as a replacement in our day to day lives. I'm not sure Lightning is the solution. It works but I'm not sure if it scales to world wide adoption. I believe bitcoin will get there but it isn't yet and for many people this is a big flaw.
2. Miner centralization is a big threat. 
3. Irrelevance. It is possible that people just lose interest in bitcoin if the fiat system slugs along long enough. I do have concern that development and focus on it will wane over time and it will ossify.

I can't think of all of my concerns right now but those are a few. That said, I do not think they are likely to kill bitcoin.