UBI, as a result, may lock people forever in a jobless situation. UBI will not provide enough capital to bootstrap anything, it might disconnect you from people doing something. This can only increase the resentment between employed and unemployed classes. Granted, some will find themselves doing what they wanted to do their whole life (non-profitable) and couldn't because they had to put food on the table. But is this the case for everyone? I am afraid the rest will risk being marked "not useful" for life, and that doesn't sound like something that makes one happy...
Sorry, it is just my random philosophical thoughts and no real answers or pieces of advice here...