You don't need a "great idea". We built an incredibly crude v1 of Cronitor because my friend and co-founder needed to know if an important cron job failed. This

You don't need a "great idea". We built an incredibly crude v1 of Cronitor because my friend and co-founder needed to know if an important cron job failed. This meets no definition of "great idea" but has been a fun, challenging and profitable side business for over 3 years now.