Dark Web currency (that is, Bitcoin, and so on), will grow, with many more cryptocurrencies popping up, which will also be a result (or the cause) of a proliferation of Dark Web access.

In the future, there will be new, completely decentralized marketplaces that rely on Bitcoin's (or a different cryptocurrency's) blockchain technology. This technology will apparently be used to guarantee trust between buyers and sellers and to ensure safe transactions.

Currently, the top cryptocurrencies are Ripple, Litecoin, Ethereum, Dash, Dogecoin, Banxshares, Stellar, BitShares, Bytecoin, and Nxt, with more popping up all the time.

The following screenshots taken from several cryptocurrency websites.

Ethereum is a decentralized platform that runs on a custom built blockchain, an enormously powerful shared global infrastructure that can move value around and represent the ownership of property. You could look at it as a secure cryptocurrency platform. Let's look at the following screenshot:

Ripple is a company that provides a secure blockchain-based network, to facilitate secure transactions, called RippleNet. Let's look at the following screenshot:

Litecoin is a peer-to-peer online currency. It's an open source, global payment network that is fully decentralized without any central authorities. Litecoin is a proven medium of commerce complementary to Bitcoin. Let's look at the following screenshot: