Nostr is already a decentralized p2p betting platform.
No shitcoin smart contracts or trusted oracles. The bet security deposit is your social reputation and the eternal shame of losing a bet and not paying up.
nostr:nevent1qqs9gu6x80c67uqmfdvde3enyqu82te5g2ykvy0hgfypshr3vdpkg6sp2emhxue69uhhyetvv9ujumn0wd68ytnzv9hxgtmwwp6kyvfkwgc8gmpcvyenj6rgvdexzurpxqen2dfe0psksum2w94rgues0ym8gvnwx4nhqertxc68vvpkdf6xwettw9jxk734wpkqyg9d7uvs3g85je290jrew2ve0fz9mljlhxt4tln3kmm8f2fwkm6kuspsgqqqqqqs6t423q