SRC copied QRK so..
It's not the most secure coin.
well, maybe not the most original coin, but there's a lot more to a coins success than the code. these are crypto
currencies after all, and it's important that they be evenly distributed among miners/users to ensure a healthy economy. just look at premined/instamined coins, like PPC, NVC, or FTC, not so much volume because massive bagholders manipulate the price. in regards to SRC and DGC, both were released very fairly, without giving early miners a ridiculous advantage. so while SRC is a copy of quark (which was a copy of sifcoin) it was released far more cleanly and professionally.. not to mention its development is active which is absolute necessity for a coin to succeed in this competitive environment.
right now while it's safe to say multi-algorithm coins don't pose much of a difference to using just one (as SHA-256 and scrypt seem pretty bulletproof so far) if in the future some achilles heel is discovered in their encryption methods then having a chain encrypted with several different algorithms would prove useful. imagine sha-256 getting cracked, i sure wouldn't mind the mass flood of BTC into SRC as people try to protect their investments

very unlikely scenario but nothings impossible..