Futures with x1000 leverage is probably one of the most stressful and unpredictable things that the Betfury team has ever added to their site. But what is remarkable is that some users aren't intimidated by it at all. At least, according to the leaderboard, some of them are actively using such high leverage.
Generally, players who bet with leverage above 100x on BetFury usually wager just a few of $, they would never dare to bet, for example, more than 3 - 5% of the bankroll, unless they're a scalping expert, which is an extremely risky operation depending on how much leverage is on the platform.
From my experience, I've lost less with leverage than with casino games, and with Betfury Futures, what counts is your skill, now with leverage of 1000x, especially with a large amount of funds, a single movement in which the market goes against your position, you lose and are out of the operation.