tl;drBitcoin transaction getting expensive and slow - Is a real problem.
Decreases adoptability and utility, which in turn may impact long term value of bitcoin if people gets frustrated and move to another equivalent cryptocurrency.
Full response below.
Right. Now I have a bit of time.
The reason why transaction fees are increasing is because bitcoin as a whole has gained popularity, and the limited block size translate to a linear growth of block creation demand with the increase of number of transactions. When you have huge demand for block creation, limited number of miners and high difficulty, you get slow, expensive transactions.
How this could be a problem? After all what you just need to do is to hold bitcoin and not transact, right?
Well, this could impact utility and adoptation of bitcoin. Like I have mentioned earlier, what gives cryptocurrencies its value is the value of utility, may it be privacy (DASH, PIVX, Monero), speed (Ripple, Lumens), flexibility (Ethereum), scarcity (basically any coin with a cap). Now bitcoin is failing on speed and flexibility (though SegWit and Rootstock may come to the rescue), and bitcoin is not inherently anonymous if compared to the protocols privacy coins offer especially when care is not taken. High transaction fees results in the inability to do micropayments, as your transaction would never be mined (you could potentially pay more than you transact!). As an asset class the cryptocurrency world is filled with altcoins, so while this asset class has a capped supply, it could be viewed as "not scarce" as it is trivial to introduce another new cryptocurrency (adoptation is another story, but that relates back to the value of utility I have mentioned).
Ultimately if not dealt with, could cause "The Flippening" where people start seeing bitcoin reflecting a lower value compared to other cryptocurrencies, subsequently moving their money to others, causing a bearish trend and you could lose money.
The point here being, there is a reason why some of us talk about bitcoin being slow and expensive and etc. And while you might not appreciate the technicalities behind the situation (which is perfectly fine btw, serious), but as more people get onboard bitcoin, the impact is real. So I would discourage people from simply brushing off the situation as that Paypal/IPO/BON/bank transfers etc have their own charges - Which by the way, is a bad example as these transactions involve intermediaries and counterparties, being totally the opposite nature of the decentralised ecosystem of bitcoin.
If you hold Bitcoin but you are unable to transact it definitely impacts utility and value of the coin.
I know next to nothing on the tech behind it but it seems if you can't do anything with the coin it becomes a white elephant and that... Is definitely not good!