CoinSpot might be a bit more popular than BitBay. We know about 1 link to it since March 2021 and only 1 link to BitBay. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
BitBay is originally Polish exchange yet (as I read somewhere) moved their business to Estonia. Also, I'd recommend Kraken. Source: over 2 years ago
Coinspot.com.au allows for this too paid daily. Source: over 2 years ago
Coinbase - Bitcoin, safe and easy.
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BitStamp - Provide reliable and easy to use service for companies and individuals to exchange bitcoins.
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Bitcoin Wallet - Bitcoin Wallet is a mobile application that allows you to send and receive digital currencies.