Bitcoin only.
Apparently we aren't allowed to demonstrate agreement with an opinion or add emphasis to a fact with a simple "
+1". I've recently had my "
+1" posts removed. Therefore, I'm typing out this message to indicate that I believe the quoted information needs extra emphasis to avoid being unnoticed in the rest of the chatter in this discussion. I may (or may not) also have added bold or underline tags to the text in the quote above to further emphasize the parts that I think are important to understand or be aware of.
It should be noted that if cryptocoins are going to "make it", then Bitcoin will lead this charge. In short, if only two of them make it to widespread adoption, Bitcoin
will be one of those. With other alts, it's a matter of "Bitcoin plus perhaps X or Y", and that's the bigger gamble.
For that reason, I agree with the two previous authors: Bitcoin all the way.