Define "die".  Monero is currently operating more efficiently than ever before.  It truly offers privacy and is easy to use.  Grin presents a nice concept, although it falls slightly short in terms of privacy compared to Monero, it compensates with significantly improved scalability.  Personally, I pay with XMR my grocery shopping, and I'm certain it receives acknowledgment from other crypto enthusiasts as well.  The fact that rich aren't investing in it doesn't diminish its attention.  It still captures attention, quietly.  It's just not the top store-of-value asset, that's all.   

We shall not forget the purpose of cryptocurrency.