Give or take, how long do you wait to receive your coins? At what point do you start to become suspicious?
For bitcoin generally takes a few hours for transactions, but for altcoin like ethereum, doge, wave it takes a few minutes, if token using smartcontract or wallet erc20 i think 2-5 minutes. I start suspicious when the transaction does not get in the wallet after 1 day, but it also depends on the provider of wallet or exchangers.