I think the absolute majority of strategies will fail and of course they need to be tested at low stakes, this will be practically no different from high stakes, except that it will save us a lot of money. Who knows, maybe we will never be able to find a strategy at all, in which case many players get disappointed and go to play at high stakes in the hope of catching luck and not thinking at all about the fact that there is a chance to lose and it is greater. I recommend being more responsible and not playing at high stakes if we cannot afford to lose and restore our bankroll in a short period.
As much as many players would like to play at low stakes, there will definitely come a time when they just get bored and want to play at high stakes to feel incredible emotions that they have not experienced before. It is at this moment that our brain and mind turn off, and we give in to a momentary desire, for which we may then be ashamed, in front of ourselves. Such things distinguish those who lose very large sums from small ones. Of course, this does not happen to everyone and some will be very lucky to win the jackpot at high stakes. But we must not forget that such players can then come back for new emotions and ultimately lose it.