Good read. Honestly, the people who opted out weren't thinking long term anyway. They probably just saw the short term money that was possible to gain. If we ever see cryptocurrency increasing by a tenfold, that's when those co-workers of yours will get back to you and regret their previous decision. And I'm pretty confident that it will increase by a large sum.
Thanks @sizuru I'm confident as well. Early adopters that stick with it will be well rewarded later on. Thanks for checking out my post.