The main problem when sending bitcoin with difference kinds of wallet are excessive Bitcoin fees, for small transaction will get difficult choose they have paid over $3 to $5 and some time could be large amount of fees have to sent. I think sending small fund of bitcoin as transaction is not friendly for user want to sent little amount of bitcoin but worth for huge amount of bitcoin.
Get possibilities increasing large fees bitcoin transaction in the future when bitcoin raise to higher price make small fund transaction not really worth when adopting bitcoin as payment transaction. Get exceptional if have or support with lightening network without take any fees transaction yet and likely is most worth way for sending bitcoin.