Anyone agree?
Bitcoin thrives because of its resistance to corruption that comes from being a proof-of-work based currency. Whether this corruption is in the form of a government requiring identity be associated with a transaction, or an issuer deciding to steal from savers by devaluing the currency, or an authority deciding which transactions are allowed and which ones are not.
If other currencies have this same resistance to corruption, then they will have value as well. The problem is, not all alt currencies have sufficient proof-of-work to be protected.
Having these alt crypto coin currencies out there helps in one area ... we no longer need to waste time answering the question "what will happen when a Bitcoin clone arrives"? The answer .... pretty much nothing!