Manage your balance well is the best way to have a smart gambling. People usually lose in the big bet and win in the small bet. That's why most of them are losing.
Winning or losing is about luck and sometimes I see people win a high amount when they use high amount as well. Or even someone that got lucky with high multiplier and win high amount using small amount. In the end it will be luck and smart way to play is not to play for profit but only to play for fun with small amount everytime