I don't understand this either. Does Signal need to compete with streaming services like Netflix next? What about Steam? I didn't choose Signal as a platform, I chose it because it is (supposedly) a secure and privacy focused messenger app.
I guess there are some users who expect something in this vein after seeing it in whatsapp or imessage? Still, bundling some unstable opaque cryptocurrency to it instead of just normal money seems a bit disingenuous.