Copy trading can profit or lose quickly. Check drawdown, leverage, slippage, track length and transparency.
Possible, but do not look only at returns. Copy-trading performance can be polished by short-term leverage, survivorship bias and hidden losing accounts.
Max drawdown, longest losing period, position size, leverage, copy delay, slippage, live history and withdrawals.
Test with minimum funds first and do not treat copy trading as guaranteed income.