I just saw your reply, after replying to the original post (my reply is somewhere below), but I think your points enhance the appeal of alternatives. Some of the reasons I expect others could gain ground are [apologies for excerpting from my original reply]:

"... And although it might be hard to predict which ones will be "tier 1" currencies, we can extrapolate a bit here and imagine that together with BTC we will see more of:

1. those using the ethereum protocol will stand a good chance of wider adoption;
2. those addressing concerns like security / privacy (XMR comes to mind here) will gain usage;
3. those with a declared specific customer base / purpose (XRP and large, institutional banks and cross-border payments, and ICN and money managers creating baskets of cryptos for investors to buy into come to mind);
4. and finally, those that invest a lot in marketing and separate themselves from the others that will be relegated to speculative status."

This last point probably applies most to those like DASH that are directed towards e-commerce.

But, Hive account@misfortunecookie, we should presume that BTC's devs will work to always improve it. That is a given, IMHO. Especially if they see more vendors signing on with other cryptos -- that will be a huge incentive for solving the issues you identified.

Great reply to a great post (kudos, Hive account@jrcornel)!