Pico and WiFi unable to create socket

Maybe it is a timing issue and using a Promise could help.. dont know the complete code but something like this could work:

function getPrices() {
  return new Promise((resolve, reject) => {
    h.get(`${proxy}${api}${symbols[++symbolCtr % (symbols.length + 1)]}-${currency}`, res => {
      let pricesRaw = "";
      res.on('data', d => pricesRaw += d);
      res.on('close', () => (prices[symbol] = JSON.parse(pricesRaw), true) && resolve());
    });
  });
}

And in your other code just do:

getPrices().then(showPrices);

Error handling ommited for keeping it simple.. but you should take care of it :)