For me, altcoin has many advantages, one advantage is it gives to the individual money to sustain the basic needs, It also reduce the increasing number of unemployed in some countries, The people who work in bitcoin develops the ability to reason out, enhanced the English proficiency, that's the some advantage of altcoin
There are lots but one of the major ones I have seen so far in comparison to bitcoin is the fact that altcoins do not have the same supply issue that bitcoin has. There is always a better supply of coins with altcoins and they are way cheaper and with a much higher potential for return on investment. They also help to introduce new and improved technology into the market.