The major benefit is of course the huge upside to where the price could go. We've only got a couple or three million bitcoin holders globally right now, most with tiny amounts invested, and that has taken the price up to a high of over $16,000 already, starting from $0.02 7 years ago.
There are many other benefits as well, like being a part of a whole new economy, or ending the Fed and possibly even stopping nations from being able to finance wars. This is of course just as controversial and speculative as the price is, but you'll find no shortage of people that work tirelessly towards that end promoting bitcoin for those purposes.