So old aren't always gold, xrp is an old coins but from recent developments it's clear it's no gold and was never a project worthy of investment from the onset. That a project give you profits doesn't automatically means it's a genuine investment. We have thousands of scams making people thousands of dollars but that doesn't mean you should follow suit and fomo into investing in them.

Bitcoin is the only worthy project worth investing in that there is an assurance of its continue growth due to the decentralized of the project and finite supply. That can't be said about other old project like ethereum, litecoin etc. Why old project are preferable to be worthy of investment is due to the trust they have earned over the years form the community members.

Therefore any old coins that don't have trust from the community shouldn't be considered gold and be avoided by all cost. In general go for bitcoin while you can likely trade other coins.