Thanks for your comment.

But I wonder, Steem has zero fees, low transaction times, and it fluctuates quite a bit, too. I don't see that mass adoption is happening for Steem yet.

As to the Lightning Network, do you think that eventually, the Lightning Network will ever bump up against a bottleneck at the original Bitcoin blockchain? I have some reservations about this Lightning Network as I think it increases the attack surface of the currency.

I haven't studied it all that much, though. I am just not sure how adding another layer to transaction processing is going to help in the long run.