Jesus Christ. I'll paste it here:

Ripple is not a cryptocurrency. It is an electronic token, issued by a company: Ripple Labs, Inc. This private company can do whatever it wants with the coin. They can create tokens from thin air if they want.

Ripple is alive because of the huge lobbying efforts towards banks and other financial institutions that are afraid of the disruptive threat of the crypto world and want to buy a share in the game. The wrong share.

Ripple is not open-source. No server source code has ever being released, with the paid developers behind Ripple admitting that it is to prevent others from building something better than Ripple. You cannot contribute to Ripple's code, because it is not open source. Every single Ripple node is controlled by a private for-profit company.

It is centralized, like a bank or PayPal. Not a decentralized currency. Ripple pre-mined 100 billion Ripple coins for themselves and didn't allow others to mine during this time or even tell people it was happening.

Every cryptocurrency is subject to a 51% attack. In Bitcoin and similar cryptocurrencies, miners control the network, and if a miner gains 51% of the total network power, then they can choose to double spend transactions. Some altcoins have tried trust nodes or central checkpointing, however that only moves the 51% attack vector from miners to another entity which can be 51% attacked. In Ripple, it is already 51% attacked by the 14 employees of OpenCoin, Inc. They control the server software (written in C++), and they can choose to double-spend transactions at will. While it's highly unlikely that they will do that, a centralized entity means a single target for law enforcement and court orders.

It is a large-scale scam.