[Polymarket has launched the '5-minute BTC rise or fall' prediction market and plans to launch the '1-minute rise or fall' prediction market] According to official news, Polymarket has launched the '5-minute cryptocurrency rise or fall' prediction market, which settles every 5 minutes and currently only supports BTC. Additionally, Polymarket team member Mustafa stated that the '1-minute rise or fall' prediction market and the POLY token are part of the next phase of the plan.