2. I take the example of privacy coins like (XRP)
XRP (Ripple) is not a privacy coin buddy, maybe you referring to XMR (Monero).
Its our own diligence if we fail our investments or get scammed. The importance of taking time to research and gathering information can really help in formulating decisions and will give a go signal whether to invest or not to invest in a particular project, regardless if they are established or not.