The drop of in transaction fee of bitcoin in the network was the successful launch of lighting network, and i believe it is the follow up of the segwit. Now it is good to transfer bitcoin to bitcoin for the low fees. I do not know if this is for temporary or for long term but it will make it a stand-strong and attract new investors as last year it was the main issue of bitcoin (high-transaction-fee). In Altcoin this will be another challenge to compete.