When we speculate in this democurrency market, we need to find the unique point of each democurrency, every unique point can support only one democurrency.
For example:
BTC: first democurrency, most well-known.
Doge: NO.1 hashing power of scrypt algorithm.
LTC: first coin to adopt scrypt algorithm.
IFC: first coin to have a quick issue, big money supply and short block time.
XPM: first coin to adopt a mining algorithm than can help find prime numbers.
You may argue that I missed PPC. Well, in my opinion, the essence of democurrency is POW, POS doesn’t contribute to hashing power. If the currency is under a 51% attack, POS can do nothing about it. If you have read the source code of POS, you are welcome to discuss with me in this aspect.