Here are two indices that are the result of unique investment analyses on the entire market of crypto currencies, assets and tokens. I would consider accumulating any crypto on these indices.
The first one is CAMCrypto30 and lists 30 top performing crypto:
http://www.crypto30.com/index/
The second one is called CRIX and was developed by researchers in Germany. They have details on their exact calculation formulas on the site. One thing I like about CRIX is its emphasis on liquidity (i.e., how easily the crypto can be traded) for a crypto to be included in the index:
http://crix.hu-berlin.de/#page-top
Please keep in mind that the above are meant to help investors filter the copious amount of information on sites such as coinmarketcap.com. So if you are aware of other indices similar to the ones mentioned above, by all means recommend below.