Yes, it is very likely that if the Central Bank regulates cryptocurrencies, more taxes will be imposed, which could harm certain users and investors. This would include:

1. Capital gains tax: if you buy a crypto at a price and then sell it at a higher price, you would need to declare and pay taxes on that gain.

2. Stricter fiscal control: platforms would be required to report your movements to the tax authority, which would eliminate anonymity and increase your tax burden if you operate frequently.

3. Transaction fees: additional commissions could apply for using regulated exchanges or making withdrawals to bank accounts.

This would not affect everyone equally: small investors may not suffer as much, but those who trade or manage large volumes would see an impact.

However, not everything is negative. Regulation can also attract institutional investments, provide greater legal security, and facilitate the legal use of crypto for payments or savings.

In summary, yes, there would be more taxes, but also more stability and acceptance. The important thing will be how the regulation is designed: if it is fair and balanced, it can benefit the ecosystem in the long term.