Web socket not working? (paper account)

Even receiving a “subscription” message after connecting to alpaca’s web socket, it does not seem to be sending me bars. What is going on?

The code:

const ALPACA_WS_URL = 'wss://stream.data.alpaca.markets/v1beta2/crypto'
const ALPACA_WS_KEY_ID = ''
const ALPACA_WS_KEY_SECRET = ''

const alpacaWebSocket = new WebSocket(ALPACA_WS_URL, { perMessageDeflate: false })

function createJsonBuffer(json: any) {
  return Buffer.from(JSON.stringify(json))
}

function authenticate() {
  alpacaWebSocket.send(createJsonBuffer({
    action: "auth", 
    key: ALPACA_WS_KEY_ID,
    secret: ALPACA_WS_KEY_SECRET,
  }))
}

function subscribe() {
  alpacaWebSocket.send(createJsonBuffer({
    action: 'subscribe',
    trades: ['BCH/USD'],
  }))
}

alpacaWebSocket.on('message', (dataBuffer: Buffer) => {
  const [ data ] = JSON.parse(dataBuffer.toString())

  if(data.T === 'success' && data.msg === 'connected') {
    authenticate()
  }

  if(data.T === 'success' && data.msg === 'authenticated') {
    subscribe()
  }

  console.log(data)
})

The logs I am getting:

{ T: 'success', msg: 'connected' }
{ T: 'success', msg: 'authenticated' }
{ T: 'subscription', trades: [ 'BCH/USD' ], quotes: [], orderbooks: [], bars: [], updatedBars: [], dailyBars: [] }