The manipulations will end when the cryptocurrency market capitalization increases. Capitalization will increase naturally with the adoption and promotion of cryptocurrencies. Sooner or later this will happen and prices will rise regardless of whether the whales will manipulate the market or not. If not for all cryptocurrencies, then for a large part better days will definitely come.
That's the right path that we should be going, however, it will not happen instantly or easily, we will have to go through a lot of trials before that succeed.
Adoption will come once the market is secured and safe to play with (whether you invest or use it as tool) and with that we need this market to be fully regulated and let's hope that regulators will be positive with crypto so it will not be hard for them to regulate it.