Sports Betting Bitcoin- Bank Transfer- Coinbase

So I bought bitcoin with the intention of transferring it to 5dimes. It was bought on coinbase and the transfer from my bank account began on 09/02 however the money was not available until today 09/10. During this time bitcoin has lost about 15% of its value. I would think since my bitcoin was not available in my coinbase wallet until today this decrease would not effect me. However, when it was available today I am down approx 15% from when I initially started the transfer. Is this normal? This seems unfair. Every time I transfer money from my bank acct to coinbase am I going to be subjected for approx 5-7 business days until the money is available to the volatility of bit coin even though I do not have have access to my funds and it does not even show in my account?
Any help with an explanation is appreciated

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