There are at least three bitcoin ETFs that are somewhere in the process of seeking SEC approval. I'm not aware of any ETFs (existing or proposed), for other cryptocurriencies
The Winklevoss twins, (remember the Facebook movie), have filed new papers this week with the SEC as part of their efforts to get their bitcoin ETF COIN approved. Not everyone in the bitcoin community is happy. There is talk that "hard fork" issues will cause compatibility issues and may force bitcoin to split into two separate coins.
There’s another proposed bitcoin ETF from a company called SolidX that is also structured as a grantor trust.
The biggest difference between this bitcoin ETF proposal and the Winklevoss one is that SolidX included a type of insurance in case there's a hacking or some security breakdown on the price exchanges they’ll be using.
The third bitcoin ETF proposal is from Grayscale, who already has a bitcoin exchange-traded product, though not an ETF. Grayscale created a limited partnership (LP) that owns bitcoins. They trade on the over-the-counter (OTC) market under the symbol GBTC You can trade the Grayscale Bitcoin product today. They charge a 2% expense ratio for facilitating investable access to bitcoin. It trades like a closed fund and does not have the ability to create or redeem shares in the open market, which can significantly crimp liquidity.
An entity called the "EtherIndex Ether Trust" filed an S-1 July 15, 2016 with the U.S. Securities and Exchange Commission (SEC). If any of the Bitcoin ETFs get approved an ETH ETF may follow, although this one doesn't have a lot of good press.
Top 15 Cryptocurrencies
For the whole list of 659 cryptocurriencies go to: https://coinmarketcap.com/all/views/all/
# Name Symbol Market Cap RecentPrice
1 Bitcoin BTC $19,812,815,481 $1223.61
2 Ethereum ETH $1,552,202,844 $17.37
3 Dash DASH $317,566,482 $44.52
4 Ripple XRP $210,761,939 $0.005674
5 Litecoin LTC $190,212,792 $3.80
6 Monero XMR $173,636,866 $12.37
7 Ethereum Classic ETC $120,475,011 $1.35
8 MaidSafeCoin MAID $73,828,043 $0.163137
9 NEM XEM $70,766,730 $0.007863
10 Augur REP $55,681,230 $5.06
11 Zcash ZEC $32,536,551 $42.08
12 Iconomi ICN $28,991,619 $0.333237
13 Factom FCT $27,718,819 $3.17
14 Tether USDT $24,950,994 $1.00
15 Steem STEEM $23,495,479 $0.099182
Further down the list but with a lot of potential according to some experts are Lisk (LSK), NAVCoin (NAV), and SysCoin (SYS).
Some people claim to make money, (the $USD kind), by trading these 659 curriencies. Some are very volitile jumping around with various news articles.