Earlier quoted context omitted.
If you don't look at the price, it's the most stable and predictable service and protocol in the existence of the internet (maybe after the internet / IPv4). It's uptime is 99.987%, last time it was down in 2013, and the cool thing is that even if it gets down, it has self healing property in the case of network separation / sybil attack. https://www.buybitcoinworldwide.com/bitcoin-uptime/ I dare you to find another…
The problem is Bitcoin Core may have (will have) unknown vulnerabilities and those might not get patched correctly once discovered.
Sadly OP_CAT operation is disabled (or substring equality operation), which would make lamport signatures available again for high value transactions. I would love it if lamport signatures would be enabled again (it would be quite easy to do), but I'm afraid that there isn't enough concensus to do it at this point, because some people would think that it's wasteful, and also lamport signatures are dangerous, as they can be used only once.