Litecoin is a joke.
Monero could replace Bitcoin, but only if it develops an offline transaction signature platform.
NR 1 DEMAND IS SECURITY, YOU NEED TO HAVE COLD STORAGE TRANSACTION CAPABILITY
Otherwise your altcoin is worth shit.
Here's a start:
https://bitcointalksearch.org/topic/m.11626658
That is offline wallet generator.
I`m talking about offline transaction with watch only wallet like ELECTRUM and ARMORY provides with bitcoin.
Its worthless to create the address offline, when you need to connect it to the online PC to perform a transaction. ELECTRUM & ARMORY for bitcoin solves that problem.