What do you say? The fee of BTC is lower than normal fee so much. You can transfer a million dollar (by BTC) and the only fee less than $ 10. There is no such cheap transfer service. You also know the fee of BTC belong to Blockchain. If many transaction need to process, the TX will be pending and the fee is increase. The fee is calculated by number of shipments, not by quantity of you transfer, so If you transfer a small, the fee will be large