I found out BITS a year ago. I was intrigued because it's one of supernet's core coins and acquired around 0.5BTC as I expected things to happen. Unfortunately I have not seen any progress during that year. Other supernet coins showed a lot of progress during that year, attracted buyers, have new features etc,
That's wrong: opal is dead for many months now, many pp sold everything, and dev seem to have died too

and what I am still having here is a wallet which malfunctions and takes ages to sync like last year.
That's true ;-)
By saying "other coins" I didn't mean all.
I don't know about all of them but VRC, BTCD and VPN made a lot of progress, attracted buyers attention etc.
Even Gavin Andresen (bitcoin developer) has shown interest in Iguana project of BTCD team

VPN has drown huge attention twice within 10 months. (I bought at 71 satoshi and sold at 900, the price went up to 5000 sat.)
Increased it's market capacity at over 7 million USD