It's one of the cheapest way to and also one of the most private and secure way too. A majority of the time crypto transactions in general are way more cheaper but I think bitcoin still stands out especially if you're using lightning network or even on chain in periods like this where fees are very ok.

Depending on the number of UTXOs the sender has to consolidate to make that particular transaction, he can spend less than 20 cents in fees for a transaction that is up to $10,000 or even more. Worse thing may be it would arrive within an hour depending on the congestion of the mempool at that time.