Considering you could have used the money to buy bitcoins and essentially double your money instead, what purchases did you make this year that you are now regretting?
If you knew what you know now, would you have been more frugal with your money?
I blew $2000+ on a vacation earlier this year. I could have easily postponed it by a year and bought bitcoins with it.
This probably would have been enough for 3-4 vacations.