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There only 21 milions BTC limit. This Hard Fork is inevitable, doesnt matter now or after a year. In the case that NO Hard Fork : ETHERIUM will reach the price of BTC very soon...

does eth scales better?

ETH maybe will fall down to 0.07 BTC and then way up to over 500 $ and more.

Scales will be better

is it ok to put btc in exchange if it forks?

If it forks will be the best time to put BTC in exchange....