I was just playing around a bit with planck units, and put all the important units in a little table

this is an important topic in Physics
We use: meters, newtons,seconds ect but all of them are conventional units

Are there universal units which can make sense also to an alien civilization ?
Natural units, in other words
The Plank unit as well as the light speed maybe some of them
All other units should be derived from the universal units
thus they would be assigned a physical meaning
This is just of course a theoratical solution since you can expect huge and very small numbers
Honestly I dont know whether scientists came to some conclusion
I read some letter exchanges between Einstein and a lady on this subject but I did not delve into this topic