It is a "Stat Enhancer"
Source:
Nikeh ( requires bachelor in Sports Science )Upon used, they give +1% of the specific stat, on your case, Dex, based on current value (not 1% permanently, 1% of your CURRENT TOTAL);
It is advised to use it when you are on multiple billion of a specific stat, usually you are a very old player and rich;
Their value is on the multiple millions zone, Parachute by current Market Price is ~420 Mil for example;
Usual recommendation is, unless you already know your build, have many billions in stats and very high NetWorth, use it;
If you do not meet criteria above, sell it, will help you considerably more;
Considering your in-game age, sell it, it is a very luck find!
Consider selling to a trader if you are not confident in self-hosp , place the $ after sell in a ghost trade and safely save it after.
Any additional questions just quote this message or pm me \o