We all know the advantages of BTC, but what are some of the disadvantages??
Well one that i can think of is that it is still not perfectly anonymous. Personally i'd like to see bitcoin evolve into the future into something like XMR with essentially in built coin mixing. This is probably not necessary but rather an add on.
Another thing is that, fees are often high.
Also, blocks are 10 minutes on average in between so that means you're probably not going to be able to get stuff irl instantaneously without the merchant having to trust you.
The best advantage of bitcoins is the value that is keep on increasing as the time goes by, Another thing is that market is volatile that's why bitcoins is good for a long term investment but even there are good things like this, Bitcoins can still be used by terrorist for drug laundering or having illegal transactions that's why other governments are banning btc in their country.