Is there any negative effects to bitcoin if it becomes more popular than it is now?
We're already witnessing a lot of problems as of right now due to the increased popularity of Bitcoin and this could be considered as just the beginning. There is already a massive congestion in the network making the transaction fees skyrocket and carrying out micropayments is not at all worth it. Lets hope the core will step up and deliver big updates to overcome the scalability issue.
The main reason for the huge increase in transaction costs is not the increased popularity of Bitcoin.
The two major reasons are:
1. Miners gaming the system. By bloating the mempool with transactions they increase the fees for every
Bitcoin user, who wants or needs a fast confirmation for his transaction. Besides, most Bitcoin wallet´s
fee calculations are calculated based on the mempool, which causes users to pay unnecessary high fees.
Besides, Bitcoin Cash supporters are probably attacking the Bitcoin network by spam transactions, too.
2. The price increase
The huge Bitcoin price bull run of 2017 has caused the Bitcoin price to increase by more than a magnitude.
This has caused fees to go up dramatically, because fees are not calculated in $, but in Satoshi.
If the BTC price would experience a sharp drop, fees would come down, too.
Therefore I´d argue that the increased popularity of BTC is not really a relevant factor.
I don´t think your average person buying Bitcoin after seeing a report on CNBC is making
many transactions. They probably keep their Bitcoin on an exchange and never really
move it at all on the blockchain.