Centralization is not totally bad
Centralization in the crypto space is not totally a bad idea as some fully decentralized projects have  not lived upto their centralized peers. A good example is binance vs the bulk if decentralized exchanges. Binance is head and shoulders above them as regards liquidity and market reach. However some centralized exchanges have shown signs of vulnerability. So this is somewhat of a mixed zone.


Hacking is very real and Privacy is important
Most newbies take privacy with a pinch salt. The while essence if the crypto and decentralized movement starts with privacy and anonymity. The more private you are about your crypto exploits the less likely you are to get hacked because you wont have the obvious target on your back. Also considering regulations about legality and taxation are still sketchy, it is better to keep everything private.

Currency trading is easy.
Trading of cryptocurrencies like other financial or traditional assets is not necessarily a hard task. However a trader has to me emotionally capable, always be ready to take profits from time to time (starving off his/her greed). Most importantly, if the market is going bad, don't rely on any crytpi experts. No one owns the market and no one knows how the market will behave. play it safe and you will be good.

I hope I have added value. kindly reply with your ideas.