The token swap won't be 1:1 when it comes because it wouldn't be fair to BFG(Btc) holders. You will get more of those tokens swapping BFG(btc) then swapping BFG(trx). I asked this in their telegram as soon as i heard that there will be a token swap.
That's how I unterstood it too. But anyway, the major value of BTC BFG is the much better daily payout from staking. It's like a passive income..
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I know, here are my current stats:

I am still gathering them while it's worth it.
I am counting that eventually my btc dividends will eventually cut at least -50% because around half of them have been mined and more expensive btc gets, i think that less people will use that for gambling. But i think that my btc dividends have a high change to grow in usd value.
But if they keep finding ways for gamers to play like current competitions, and giveaways for higher ranks, new currencies to play with, token burnings etc... I think that token holding could end up being really worth it. And bearing in mind that my tokens don't have any expire date, they just keep making money while people keep playing.