Is it safe to invest in the XRP or we have to still wait for the stability of the XRP?
It's not safe and stay away from this garbage coin. If you are dealing with this coin and you are putting your money to the chance to get lose instantly due to the bad announcement from SEC that maybe come soon.
Ripple will never stable. It will be following the news that will come from the legal battle with SEC.
if the news will be good and XRP will get positive trend but the opposite thing may happen too.