2X leveraged ETFs- hold only few days,sometimes it's just 1-2 days,sometimes a week,but usually not more than 2-3 weeks. Like the speed/volatility of these 2X etfs on companies I believe in.Mind you, I do not get into ALL of them, only the companies whose parent I really like( IONX,PLTU, HIMZ,ARCX to name a few).