I believe in bitcoin that the price will increase before the block halving, I have bought some of bitcoin to hold it, now the price in the market is $774, its possible to be increased $800 in this week.

It might not be that bad to buy now and sell soon, but he should definitely sell his Bitcoin before the halving occurs, just in case the value of Bitcoin drops off considerably for one reason or another.

If he wants to buy, it would probably be better to do so after the halving (in my opinion, I have nothing to back this up and shouldn't be taken as advice) when the price assumedly drops off a bit to equalize the discrepancy between the cost the miners have to cover and what the actual value is.

For bitcoin owners it better to keep them in a secure wallet.
If you have fiat is better to invest in bitcoin or altcoins.

In any currency flat or altcoin or bitcoin investing will be a good idea, You just need to be knowledgeable in what are you investing, In investing there is RISK, Only Risk what you can afford to lose.

i will try to save my money with bitcoin it is mean for me  invest too we can get more bitcoin with this way and i will do it for five years and i think i will get more money after 5 years

yeah if we have a good financial . then save a good amount before investing. sometimes we are not too worried when something happens in our investments, and sometimes we are more willing to take risks.

Depends what you want to do, as saving it will make sure that your money remains static and will not change, which you may welcome as some form of security in times where money values change all the time
But if you want to make more, at some risk, investment is the way to go as the internet fluctuates dramatically giving leeway to make huge growths, and as bitcoins are fairly new i can see it going this way, the internet is constantly expanding but only invest what you can possibly lose

Yes good strategy for profit making, though just for note I have seen many cloud mining services has changed into  ponzis.. and also had a bad experience with one of them (from that day I stopped showing my interests in cloud mining.)

investing it's better but do it wisely, follow the hype, easy profit there

I think that it really depends on what sort of investment you are looking to invest in. Obviously if the investment you are investing in is something along the lines of a HYIP, then don't do it at all.

But if it's investing in BTC, go ahead.