Hoarding is not negative. Hoarding is the result of speculation on part of one individual that some ware will be more scarce and valuable in the future. Hoarding makes sure that the stuff is available at the time of need, distributed to those in most want of it through the higher price. Hoarding of money is specially not negative, neither in the now or in the future, because it means that the hoarder in fact consumes less in the now, making goods, including investment goods, available for a lower price to others in the now.
Hoarding postpones consumption. This, taken by itself, isn't good, is it? Then you come to say that hoarding is akin to speculation, i.e. you hoard something so that you could sell it later at a higher price to those who most want it. That I can't understand, since it is you, the hoarder, who contributes greatly to this need in the first place by stashing something away...
You are confused, probably by the negative connotations of the words speculation and hoarding. So let me use other words.
Setting usable stuff aside, because your foresight tells you that the stuff will be more needed in the future, is investment. It carries a risk (the future could unfold otherwise) and it costs money (the price of the stuff). If you do this investment, you reserve some of the stuff in the now, when the need is not so vital, to release it in the future, when it is scarce. This way you create value. At the same time, the price of the stuff now will increase as a result of your demand, directing more investments into producing the stuff.
Consumption is not good in itself, that depends on the preferences of the consumers, that is, everybody. Using central planning, confiscation and force to extend consumption now, is destruction of value. I can not understand why people with all senses in behold can echo the nonsense from the statists.
Hoarding (savings) & investment are 2 different things.
WRT Investments your capital is at use. Yes it could be good or bad investments but doesn't matter, the capital is being used
WRT Savings, the capital is just sitting there, frozen. Might was well consider it not part of economy
Total confusion. Investment is buying capital goods for the purpose of making money. It is not only machinery, it can be stuff like oil or grain. If you save in a commodity, not money, that is investment.
Saving in money, on the other hand, is not investment, it is just saving value for the future. The special thing with saving in money, is that you do not pivot the production structure any specific way. Your demand for money just marginally increases the value of money. Also with lending out your money, you don't affect the market, you invest in what the general market finds most profitable, and you marginally decrease the interest rate.
Just as the consumers affect what should be produced, the money savers direct the investment level. No third party can know better what the level of investment should be.