Great question. If "fate" here means ultimately fading away vs. Bitcoin, I hope they eventually do! I just see them as an important interim stepping stone to that future state whether it's via supporting stablecoins on Lightning or other use cases that can serve as additional ways by which people stumble their way onto the Bitcoin network (vs. getting bogged down elsewhere).

I'm repasting below something I shared in another post to give you a flavor of what those interim stepping stones look like for us at Joltz in a loyalty & rewards context:

Today, jumping straight to bitcoin is too big of a leap for the vast majority of businesses - I can give the best sales pitch in the world of why they should integrate bitcoin rewards (new customer acquisition, etc.), but they'll inevitably ask "well what about my existing customer base?" -- the answer of course is that maybe 10-20% of them would opt-in. At that point the business says well why bother.

So they need a way to increase that %. One way to do this is with branded (fungible) loyalty tokens that look and feel much more like a normal loyalty point to consumers (plus no business wants to willingly sacrifice the branding attached to their loyalty program). You can still back those assets with BTC, but it's packaged in a more accessible-looking vessel. Another thing you could do is back it with stablecoins instead of BTC - I know that sounds cringe to us, but now you've really removed every objection a business might have. If many businesses do this, it also gives consumers the ability to much more easily exchange these different forms of value vs. what they have today. And of course they can always convert into sats, and at least you've gotten people onto the network from which they can easily do that.