Bitcoin 2014 (Amsterdam) attendee here. That conference was pretty good, and that was my first time to that city, which was an incredibly historic and amazing place.

Even back then though, with me not having traveled outside the U.S. all that much before, the amount spent for travel expenses and such ended up being much more than I was expecting it to be. I'm really glad I went in 2014, but I don't even attend the big conferences here in the U.S. even anymore.