They don't 'freeze' you. Alcor vitrifies you to avoid being "shattered".
Some of the "pseudointellectuals" include Ralph Merkle of the "Merkle tree", used in bitcoin among man other things. Marvin Minsky, who started the MIT AI lab among many others are involved with Alcor. Eric Drexler (nano tech pioneer) has written positively and may be a member. Many others who are not pseudo-intellectuals.
You sound like uninformed people when they talk about bitcoin. If you are buried or cremated, the odds are zero. With cryonics, they could be 1 in 1000 or even 30%. No one knows yet, but the odds are non-zero.
You should do some reading here:
http://www.alcor.org/Library/index.html