Saving bitcoins for a long time have a major benefit. Suppose in 2010 the bitcoin price was $1 and now its $1040 so the investment has paid 1000 times and in only 7 years, where can you find a better investment than this??
Never mind about 7 years earlier, just a few months ago it was only about 700$ and it was able to get to nearly 1200$ in a really short time, so saving bitcoin is not only good on the long term but also on the short term if you really pick the best time to buy and sell, but also long time saving bitcoin may really work but we are not sure about the future of the bitcoin.
for me they are just keeping it and waiting for the right time to convert or trade it. Especially if the rate of BTC is high.
But, surely they will get trapped one or other because no one could predict the exact higher prices of bitcoins. It will keep on increasing and they might miss them with their active trading.