Here's what I think. Cuban thought he could get some attention if he came up with a take like this.
I do think plenty in Silicon Valley hold Bitcoin but never talk about it. I think they want a government more friendly to it. I think they also see the train wreck that is Biden admin. They also likely think Trump will reduce their taxes and be more friendly to their business interests. The assassination attempt likely pushed some to come out publicly for him and some to switch.
Trump is toxic for so many, especially in places like Silicon Valley. Endorsing him has a high social cost. My prediction is that MANY that would never publicly support him will do so privately because its in there best interests.
IMO bitcoin or crypto is only a small factor for most but for those in bitcoin and crypto space it is a huge factor. But what do I know. Cuban knows these jerks. I sure don't.