Size is not a signal
Notional size can reflect hedging, inventory, leverage, or a temporary hedge. Read the position with fills, margin, concentration, and the wallet history instead of treating size as conviction.
Timing is the copy filter
A source wallet that entered early may have a useful edge. A source wallet that just filled after a large move may be a late-entry trap. Compare the current price, recent fills, funding, and remaining room.
Your wallet inherits a different risk
The same position can be safe for one account and dangerous for another. Check withdrawable balance, margin headroom, drawdown tolerance, and correlated exposure before mirroring anything.