Не работает preg_match

Есть строка - string(1600)

0 BTC 0 0 0 0 0 0 Generating... Request a payment Send a payment Menu 
Home Transactions Convert Addresses Funding Settings Logout 
Transactions Convert Logout 1 BTC = - USD Method Not Allowed Dismiss 
Choose buy or sell Select amount and destination Confirmation Convert 
Bitcoin and Dash Sell Buy For more information on account funding 
options, visit our Deposit and Withdraw pages. Buy Source Amount USD 
USD EUR GBP Reference currency Rate: 1 BTC = x USD USD EUR GBP XAU XAG 
Hide reference currency Source (pick one) USD Balance 0.00 USD Bitcoin 
balance 0.0002 BTC Dash balance 0 DASH Destination Bitcoin balance 
0.0002 BTC Dash balance 0 DASH Estimated rate Loading.. Go back The 
amounts are estimates. To confirm final rate, click Submit Buy. Sell 
Source Amount BTC USD EUR GBP Reference currency Rate: 1 BTC = x USD 
USD EUR GBP XAU XAG Hide reference currency Source Bitcoin balance 
0.0002 BTC Dash balance 0 DASH Destination (pick one) XAG Balance 
0.0000 XAG USD Balance 0.00 USD XAU Balance 0.0000 XAU GBP Balance 
0.00 GBP EUR Balance 0.00 EUR Bitcoin balance 0.0002 BTC Dash balance 
0 DASH Estimated rate Loading.. Go back The amounts are estimates. To 
confirm final rate, click Submit Sell. back to toptop Follow us 
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API Coinapult About Coinapult" 

Есть preg_match:

preg_match('/Bitcoin Balance [0-9.-]+/', $page , $a);
var_dump($a);

Почему данный код может не работать?