Yeah I'm really looking forward to seeing what the Reddcoin hardfork will do for staking. Reddcoin has a massive community and a lot of support so that is why I really like this coin moving forward and also its been around for years now.
I have recently been looking more into TRON and the staking feature that is on Binance, TRON also seems to be very popular with a lot of people so its well worth looking into.
There are so many PoS coins now days so we have a lot of options to choose which is best for us all.
Reddcoin's latest hard fork will be exciting for sure. Right after the announcement, I've noticed that prices have increased a little. It shows that people are still interested in the cryptocurrency despite being old. Considering its proven track record of development and innovation, it's one of the PoS coins you wouldn't want to miss in your long term investment.
As for TRON, I didn't knew that it was possible to "stake" it on Binance. It could turn out to become a nice source of passive income without the need to attend your wallet at all times. Still though, it's somewhat risky since you're leaving your coins in a centralized exchange prone towards hacking. In my case, I've been delegating TRX to certain representatives where I receive a constant reward (paid either in TRX or a token) every month. SesameSeed is a good representative to vote for, as it gives you SEED constantly. That "SEED" token is exchangeable to a 1:1 ratio towards TRX at anytime. It proves to be a nice source of passive income for TRON holders indeed.
But as you've said earlier, there are many PoS options to choose from. You'd just have to choose wisely in order to multiply your investment in the least time possible.
Presuming ETH does go full Proof of stake I think that might be one of the best choices for holding long term on the basis that many will want to be involved with mining and transactions available via a wallet if the makers allow this to be possible.
The other alternative I like and has been a pioneer since 2014 is Blackcoin BLK which is very easy to use and has a variety of apps made for it. See the video on Blackhalo on youtube for a talk through of features available.
Ethereum might become the best PoS coin in existence, if it upgrades from PoW to PoS in its entirety. With an outstanding development team, and constant innovation, ETH could create a solid PoS model that's secure & reliable. As long as the "nothing at stake" problem is solved, then Ethereum will become quite a revolutionary PoS coin to invest into.
I've been watching a staking pool for ETH called "Rocket Pool" which is still in development. It could prove to be a nice source of passive income if successful. It's only a matter of time before the ETH dev team decides to adopt Casper PoS, in order to make staking pools a reality. In the meantime, old PoS coins like Peercoin, Blackcoin, and Reddcoin, are good enough for a long term investment. I'm surprised to see Blackcoin with smart contract functionality (Blackhalo) but it doesn't appear to be under active development. If it gains traction, then it'll be quite revolutionary as well.