Whats the best alternative of coinpayments.net? Its shutting down its service in Bangladesh.. Can anyone suggest me any secure site to store my cryptocurrencies?
Best or not is up to you to decide but:
GoCoin,
Coingate, and
Eliopay are some other alternatives if you're not interested to get the sales in BTC converted in $.
Otherwise,
BitPay if you need to avoid the volatility (since the coins you'll receive are converted to USD directly, so no loss) and some services (exchanges like paymium or payments services à la spectrocoin*) can provide a cheaper solution as well. It depends on your needs
*I'm not recommending Spectrocoin, just giving an example.