Well I am new to this format but I have been working hard to get a handle on things. I am happy to share some of my thoughts with you.
There is no cap on players rising but it looks to me like in and around the 10M-11M is a natural cap.
You can't tip your hand by tinkering - no one else can see your team as far as I know. But if you have players that you think are undervalued and you want to see their value rise, it is probably a good thing to share the names so that perhaps other guys buy in as well - that is how the value goes up.
Ideally in the end, you want to make enough money to buy all the best players at each position so that you win the points side of things, but I think if you focus on that to the exclusion of putting up some decent points, once you have the money it will be too little too late. So some kind of moderation plan makes sense to me.
I am not sure it is a winning formula, but I kinda like the idea of buying 3 high end guys (again looking for possible value in their price) and 3 low priced guys who should be productive and hopefully take the money train route up, giving you lots of cash to play with. I think the other 6 players can be in mid-range price wise, but again you want production at a good price. I see the top of the range for the best 2nd tier forwards at about 7M and top of the range for the best 2nd tier D guys in around 5M. Goalies look like they follow the forward structure. So I am going to use those as sell points if my guys get close and I think I can find better production elsewhere.
Both teams I have put together still have cash in the bank once all the positions are filled - I don't see that as an issue - if you have the value players you want to start the season. Having the cash to move quickly on someone that looks like a rocket going up is likely a good idea, combining it with the money from the guy you need to sell off to make room.
I have now gone through nearly 250 players and calculated a $ figure per fantasy point they are projected to produce. Comparing that with other players and considering their contract value gives one a pretty good view of which players seem to be carrying a lot of latent value.
I think this is likely the most complicated and challenging fantasy format I have run into - it is going to take constant attention for one. Perhaps it will come with experience but I don't see a clear cut strategy that is a winner. For instance if you catch 6 very cheap guys who go for a ride - you could bankroll the points side in short order.
Good luck with this.