In your situation yes, waste of money.
The way to avoid wasting money is to know what you hope to gain by spending that money. If you know you want more volume, more detail, more bass or treble- anything like that- then you can use that to shop for something better. Even if all you have is some vague idea of wanting "better" even that might be enough of a guide. But to run around spending money on something simply because some random guys here said "new speakers" or whatever, is to virtually guarantee a waste of good money.
Sadly most of the random advice here is precisely that- how to spend and waste money. As if spending money itself is the goal. At this they are quite good!
Before spending any money at all I would advise spending time paying close attention to how you listen, what aspects of listening you enjoy the most, and then thinking about how you might like it better.
If at all. Nothing wrong with being content with what you have.
