Yes bitcoin do increases in price due to its volatility which makes it a very good ROI but this doesn’t make bitcoin a get rich quick scheme. If you’re in for that then you are easily prone to make mistakes. For you to gain you need to choose between holding or trading, the latter is more riskier than the former and it needs you to build on its knowledge. So my advice is if you are a total newbie stick only to holding first.

The forum doesn’t by any chance approves signals, although there people that actually post some signals on the forum but do not trust any of it because it is on the forum. The more reason why people disregard this signals is because it is widely accepted that bitcoin isn’t predictable and the signals are just mere speculations based on past trends of bitcoin or the economic situation of the world. So believing the signals and investing base on there predictions is not advisable, rather you should do your research by gaining knowledge.

Custodial means having everything in your own hands and not trusting anyone. The Dex means decentralized exchanges; these exchanges are those that do not require your details (KYC) when signing up on the platform and regarded the safest option if you’re into bitcoin or cryptocurrency for its privacy sake. You can actually buy from different exchanges but your country will depend on the most suitable exchange for you, so go through the local boards and look for that of your country and ask there or you can just mention your country here and someone will help you with lists of the exchanges