You are completely wrong high leverage like 1:1000 is not risky at all as you can you can use small lots like 0.01$ normally with leverage 1:1000 the different is that this leverage not eat you margin
as in leverage 1:100 when you open EUR/USD trade with 0.1$ lot it will take from your margin 13.12$
while in leverage 1:1000 when you open EUR/USD trade with 0.1$ lot it will take from your margin only 1.31$.