It’s already really difficult to save big amounts of coins😡

There are still ways of making the coin without the store's packs, just gotta observe the market. 
Too lazy to play the market now, but I got to nearly 40bn as F2P, and that's with buying plenty of the cards I wanted (or burning cash on tradeable into exchanges). Store packs removals, in a way, made it a bit easier to chase the coin. But if you only rely on packs, then yeah, you are not going to see any coin.