Why would Trump allow a peaceful transfer of power? Jan 6 happened and it failed because the first Trump administration still had people who cared about the rule of law (e.g. Pence).

I think the only hope is that the guy is old and unhealthy, in contrast to e.g. when Putin or Orban grabbed power. And it is possible that the GOP will fracture over fights between who see themselves as his successor. If this doesn't happen, I don't have much hope for the US as a democracy.