The biggest issue in Cryptocurrency today is anonymity.
The only real anonymous technology is cryptonote.
Monero is the best of all cryptonote coins.
For this reason, Monero is the most important altcoin you should invest.
Experts agree with that.
https://bitcointalk.org/index.php?topic=400235.msg6915300#msg6915300(please don't pollute rpietila's thread, don't post anything)
Monero is inferior to Bytecoin (BCN).