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exactly. What is your favourite way?

Coinbase with credit card or the Swiss Railways ATM

Do you know what is the Coinbase's commissions, fees etc? I don't immediately see it on their web site.

Using a card for purchases allows you to receive your bitcoin instantly! Coinbase charges a 3.99% convenience fee for this faster service.

Maybe Kraken is cheaper. There is a fee of 0.26% and 0.001 BTC for withdrawal.