Only if you enjoy sports. Also very few sports bets pay out a million times the money. Even a bet like France beating Canada in the ice hockey world championship only pays 33 times the money, and the prospect of winning $66 on a $2 bet is hardly exciting.

But winning those $66 while your friend just lost $2, (or the other way round) could be fun ;)

Sports become far more enjoyable when you bet on them.