Intraday trading is considered the riskiest trading in the market due to the nature of trading within a day. In my view both strategy are useful as per their functionalities. As the market is highly volatile, you need to take a minute decision with high accuracy or you will loose your money.
BTST is a facility that allows you to sell shares even a day after the buy order date, without you having to wait for the receipt of shares into your demat account.
Hold is a term that often used by stock analyst for recommending to neither buy nor sell a security.
BTST (Buy Today Sell Tomorrow) is considered more riskier then Hold but both have their own purpose. However, I took the help of an advisory firm called 100mcxtips and made a good profit. They provided profitable and accurate tips on the basis of technical and fundamental analysis of market.
(Source: https://www.quora.com/Which-is-best-strategy-in-the-market-Intraday-BTST-or-Hold )