A deposit is not credited the instant you send it. The market waits for the network to confirm the transaction, which is the wait you are watching.
Why the wait exists
Confirmations are the network agreeing the transaction is real and final. Crediting before confirmation would let a sender reverse a payment after receiving goods, so every market waits.
Bitcoin
Bitcoin confirmations depend on congestion and the fee you paid. A well-fee-d transaction usually confirms within the hour. A cheap one during congestion can take much longer.
Monero
Monero confirms quickly, usually within several minutes, and the fee is tiny, so there is little to tune.
When to worry
If a Bitcoin deposit is unconfirmed for hours, it is usually an underpaid fee rather than a lost payment. The transaction is on the chain and will confirm eventually. If the balance never credits after confirmations land, see a deposit that has not shown up.