Aspirin is best for any pain relief

Till now we are using Aspirin tables for pain relief since long time, now the experts says that aspirin is best medicines for any decease and it works out, all the best medicine than the other drug , it works not only on fever, it works from heart pain to cancer, aspirin is cheaply available best drug in the market, it is the safesest medicine of all the other medicines, how far aspirin works in long still the experts should find out