I think it would make more sense to create your own token and peg it to the combined market cap of the top 100 cryptos, updated hourly. i.e. let's say combined

I think it would make more sense to create your own token and peg it to the combined market cap of the top 100 cryptos, updated hourly. i.e. let's say combined market cap is $40b today. Create a token called 'Coin100' and a crowdsale issuing 1 billion tokens.